Xcel Energy claimed it is on course to have more wind on its system than any other utility in the western hemisphere by 2021, after an ambitious build programme that's soon to include another huge project in Colorado.

Xcel expects construction of the 500MW Cheyenne Ridge project in eastern Colorado to be finished in December. Vestas will supply 229 turbines for the $743m facility, which will be the third largest on Xcel’s eight-state electric system serving 3.6